[spring sowing] rain and snow weather hit one after another, how to judge the suitable sowing date of cotton?
Release time:
2021-03-30 17:12
Source:
Lao Dao
The recent uproar of Xinjiang cotton topic, and did not hinder the footsteps of cotton farmers sowing. As the weather gets warmer at any time, cotton farmers in Aksu, Kashgar and other places in Xinjiang have begun to irrigate and conserve soil moisture, and spring sowing can begin soon according to the schedule. However, the recent frequent rain and snow weather has affected the progress of spring sowing and preparation. I believe everyone is also full of doubts. When is the most suitable sowing date for cotton?
How to determine the time of sowing
The scientific way to determine the sowing date is to determine the sowing date (jujube and willow germinate cotton) according to the weather process information, and the ground temperature and temperature are stable to reach the suitable sowing temperature, so as to sow in the suitable period. In normal cotton fields (the temperature rose steadily to above 14 ℃ for 5 consecutive days), the ground temperature of 5cm under the film reached 14 ℃ steadily. Early sowing can be done in northern Xinjiang (the temperature is appropriate for dripping water, and the time for dripping water from dry sowing is the sowing time); Compared with normal cotton fields, cotton fields in saline-alkali land should ensure the soil moisture and mouth, and appropriately postpone sowing (5cm ground temperature is required to be stable at 16-17 ℃). The suitable sowing date is April 5-20 in southern Xinjiang and April 10-25 in northern Xinjiang, with different interannual climates.
sowing density
The sowing density is generally determined according to the requirements of the selected varieties and the conditions of soil quality and accumulated temperature. Cotton fields with fertile soil quality, strong bolling, large shelf of high yield, guaranteed water and fertilizer, and good accumulated temperature conditions can be planted sparsely. On the contrary, the density is increased.
sowing depth
According to the selected density, row width to determine the spacing. The shallow sowing depth of the side sealing soil is about 1.5cm, and the covering soil by the positive sealing method is not more than 2cm, and the depth is consistent.
Production measures and suggestions
1, the cotton area to do a good job in advance of cotton preparation work, according to local conditions, combined with the local rolling weather forecast, do a good job in different climatic regions of cotton sowing date of revision and refinement work, timely sowing moisture, and strive to sow the whole seedling.
2. During the period of cotton sowing and emergence, there is a high possibility of strong wind and dust weather. All cotton areas pay close attention to the weather forecast of meteorological stations at all levels, and do a good job in dealing with meteorological disasters in advance.
3. If you encounter disastrous climate processes such as low temperature, cold injury, late spring cold, strong wind, etc., stop sowing and postpone sowing.
4, rake operation requires attention to do two points:
1) At present, the ground is raked by wheeled high-powered locomotives. It is better to dry it a little when raking, because the ground is wet and the place where the wheels press is easy to cause compaction, which is not conducive to seed emergence.
2) When the raked ground is waiting for sowing, if it is not particularly heavy rain, it is better not to rake the ground again. It is easy to compact the ground with more operations. Also, after mixing the dry soil on the surface layer with the wet soil below, it is not conducive to snatching soil moisture and emergence. It is also easy to make the surface layer too loose after raking for many times, which is not conducive to emergence after sowing.
After ploughing, the cotton field should be raked in time. It is best to complete the soil preparation 5-7 days before sowing. The soil should be prepared according to the principle of sowing with soil moisture. Do not dry the soil and affect the emergence of cotton seeds.
Around April every year, cotton planting in Xinjiang begins from south to north. According to the forecast released by Xinjiang Agricultural Meteorological Observatory on March 25, the suitable sowing date of cotton in Kashgar, Kezhou and Hotan regions in 2021 is slightly later than normal, and the cotton areas in eastern Xinjiang, Bazhou and Aksu regions are close to or slightly earlier than normal.
The annual cotton sowing is about to begin, sowing seeds in spring and harvesting thousands of hectares of snow in autumn. Finally, the editor reminded everyone to pay attention to the weather changes during spring sowing and sow seeds in due time. I wish everyone a smooth spring sowing!
Rain and snow, sowing, cotton, cotton field, spring sowing, xinjiang cotton